LM2576

AKTIV

SIMPLE SWITCHER®-Abwärtsregler (40 V, 3 A) mit niedriger Komponentenanzahl

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Datenblatt

document-pdfAcrobat LM2576xx Series SIMPLE SWITCHER Power Converter 3-A Step-Down Voltage Regulator datasheet (Rev. G) (Englisch) PDF | HTML

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Alternativen vergleichen

Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung.

TLVM13630

AKTIV

Kompaktes 3-A-Abwärtswandler-Leistungsmodul für 3 V bis 36 V Eingangsspannung und 1 V bis 6 V Ausgan Save board space, simplify design and speed time to market with an integrated-inductor power module.

LMQ66430

AKTIV

Synchroner Abwärtswandler mit 36 V, 3 A niedrigem EMI-Wert und 1,5-µA-Ruhestrom Integrated input bypass capacitor and boot cap for lower EMI and smaller footprint, dual-random spread spectrum and lower IQ.

LM2576

AKTIV

Jetzt bestellen

Produktdetails

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

40

Vin (min) (V)

4

Vout (max) (V)

37

Vout (min) (V)

3.3

Features

Enable, Over Current Protection

Control mode

Voltage mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.005

Duty cycle (max) (%)

98

TO-263 (KTT)

5

154.8384 mm² (10.16 mm × 15.24 mm)

TO-220 (NDH)

5

86.0552 mm² (10.16 mm × 8.47 mm)

TO-220 (KC)

5

45.212 mm² (10.16 mm × 4.45 mm)

TO-220 (NEB)

5

46.4312 mm² (10.16 mm × 4.57 mm)

Newer products available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
- LM76003 3.5 to 60-V, 3.5-A, 300-kHz to 2.2-MHz synchronous converter
For faster time to market:
- TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module
3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 3-A output current
Wide input voltage range: 40 V Up to 60 V for HV version
Requires only four external components
52-kHz fixed-frequency internal oscillator
TTL-shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer

Newer products available:
- LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-MHz synchronous converter
- LM76003 3.5 to 60-V, 3.5-A, 300-kHz to 2.2-MHz synchronous converter
For faster time to market:
- TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module
3.3-V, 5-V, 12-V, 15-V, and adjustable output versions
Adjustable version output voltage range,1.23 V to 37 V (57 V for HV version) ±4% maximum over line and load conditions
Specified 3-A output current
Wide input voltage range: 40 V Up to 60 V for HV version
Requires only four external components
52-kHz fixed-frequency internal oscillator
TTL-shutdown capability, low-power standby mode
High efficiency
Uses readily available standard inductors
Create a custom design using the LMR33630 or LM76003 with the WEBENCH Power Designer

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include fault protection and a fixed-frequency oscillator.

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include fault protection and a fixed-frequency oscillator.

The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.

A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

The LM76003 requires very few external components and has a pinout designed for simple, optimum PCB layout for EMI and thermal performance. See the device comparison table to compare specs.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen
*	Datenblatt	LM2576xx Series SIMPLE SWITCHER Power Converter 3-A Step-Down Voltage Regulator datasheet (Rev. G)	PDF \| HTML	22.03.2023
	Anwendungshinweis	Semiconductor and IC Package Thermal Metrics (Rev. D)	PDF \| HTML	25.03.2024
	Anwendungshinweis	Switching regulator fundamentals (Rev. C)	PDF \| HTML	05.02.2019
	Technischer Artikel	How to increase system reliability and simplify design using DC/DC converters	PDF \| HTML	13.06.2016
	Technischer Artikel	The importance of accurate switching frequency and current limit when selecting bu	PDF \| HTML	19.04.2016
	Technischer Artikel	Advantages of leaded packages in robust industrial designs	PDF \| HTML	08.03.2016
	Anwendungshinweis	Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)		12.09.2014
	Anwendungshinweis	AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)		24.04.2013
	Anwendungshinweis	AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)		23.04.2013
	Anwendungshinweis	AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)		23.04.2013
	Anwendungshinweis	AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)		23.04.2013
	Anwendungshinweis	AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)		23.04.2013
	Anwendungshinweis	AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)		23.04.2013
	Anwendungshinweis	AN-776 20-W SIMPLE SWITCHER Forward Converter (Rev. A)		23.04.2013
	Anwendungshinweis	AN-1197 Selecting Inductors for Buck Converters (Rev. B)		23.04.2013
	Anwendungshinweis	AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)		23.04.2013
	Anwendungshinweis	High-Efficiency 3A Battery Chargers Use LM2576 Regulators (Rev. B)		23.04.2013
	Anwendungshinweis	AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)		23.04.2013
	Anwendungshinweis	Battery Charging		21.03.2007
	Anwendungshinweis	Buck Converters Provide a Battery Charger and System Power		21.03.2007
	Anwendungshinweis	Input and Output Capacitor Selection		19.09.2005
	Weitere Dokumente	SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations		12.07.2005
	Anwendungshinweis	AN-643 EMI/RFI Board Design (Rev. B)		03.05.2004

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM2576S-ADJEVM — Evaluierungsmodul für Abwärtswandler LM2576

Das LM2576S-ADJEVM-Evaluierungsmodul (EVM) ist ein vollständig zusammengestellter und getesteter Schaltkreis zur Evaluierung des Abwärtswandlers LM2576. Das EVM arbeitet mit einer Eingangsspannung von 7 V bis 40 V und bietet eine Ausgangsspannung von 5 V bei 3 A.

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Support-Software

SWITCHERSMADESIMPLE-SW — Switchers Made Simple® Software

Note: The Switchers Made Simple design computations have been incorporated into Texas Instruments' award winning WEBENCH Power Designer Online Design Tool. Please use TI's WEBENCH Power Designer online tools for new designs. The WEBENCH Design Tool also includes: